How to Measure Powder Coating Thickness on Aluminium Using Landtek CM-8826FN Malaysia

How to Measure Powder Coating Thickness on Aluminium Using Landtek CM-8826FN Malaysia

Introduction

Powder coating thickness measurement on aluminium is an important quality control process for metal finishing companies, aluminium fabricators and industrial manufacturers in Malaysia.

Powder coating is widely used to provide decorative finishes and protective surfaces for aluminium products, including window frames, architectural panels, electrical enclosures, machinery components and industrial equipment housings.

However, the final coating thickness must be controlled according to the coating manufacturer's recommendations and applicable project specifications.

An insufficient coating thickness may affect coating coverage and protective performance. Excessive thickness may also create problems such as appearance defects, dimensional variation or coating performance issues.

The Landtek CM-8826FN Coating Thickness Meter is a portable digital instrument designed for non-destructive coating thickness measurement on compatible ferrous and non-ferrous metal substrates.

For powder-coated aluminium, the instrument uses its NFe eddy current measurement function.

This guide explains how to measure powder coating thickness on aluminium using the Landtek CM-8826FN, including measurement preparation, probe selection, instrument verification, practical testing procedures and common inspection mistakes.

1. Why Measure Powder Coating Thickness on Aluminium?

Powder coating is commonly applied to aluminium components to improve appearance, durability and surface protection.

For industrial manufacturers, maintaining consistent coating thickness is an important part of the finishing process.

Quality Control

Powder coating thickness inspection helps manufacturers verify whether finished components meet the required coating specifications.

Corrosion Protection

Appropriate coating thickness contributes to the performance of a correctly prepared and cured protective coating system.

However, coating thickness alone cannot establish corrosion resistance.

Appearance Consistency

Uneven coating thickness can be associated with variations in surface appearance or finishing quality.

Dimensional Control

Excessively thick coatings may affect the fit of components where dimensional tolerances are important.

Production Process Monitoring

Regular thickness measurements help powder coating companies monitor their finishing processes and identify variation between production batches.

For these reasons, a digital coating thickness gauge for aluminium is a useful quality control instrument.

2. What Is the Landtek CM-8826FN?

The Landtek CM-8826FN is an external-probe coating thickness meter supporting two measurement principles.

Fe - Magnetic Induction

Used for measuring suitable non-magnetic coatings on ferromagnetic substrates such as steel and iron.

NFe - Eddy Current

Used for measuring suitable electrically non-conductive coatings on non-ferrous conductive substrates such as aluminium.

For powder coating applied to aluminium, users should select the NFe measurement function and appropriate probe.

Key Advantages

Dual Fe and NFe Measurement Capability

External Probe Configuration

Non-Destructive Coating Thickness Measurement

Portable Digital Instrument

Suitable for Industrial Quality Control

Applicable to Compatible Steel and Aluminium Coatings

The external probe design allows the operator to position the sensor independently from the display unit.

This can be useful when inspecting aluminium panels, fabricated components and industrial enclosures.

3. Understanding NFe Eddy Current Measurement

The eddy current measurement principle is commonly used for measuring non-conductive coatings applied to electrically conductive, non-ferrous substrates.

Aluminium is a typical substrate for this measurement method.

When the probe is positioned near the coated aluminium surface, its electromagnetic response is influenced by the distance between the probe and the conductive substrate.

This response is used to determine the coating thickness.

Suitable Applications

Examples include:

Powder coating on aluminium panels

Paint on aluminium enclosures

Non-conductive protective coatings on aluminium

Decorative coatings on aluminium components

Compatible surface finishes on aluminium products

Important Limitation

The NFe method is not suitable for every coating and substrate combination.

For example, electrically conductive metallic coatings may require a different measurement technique.

The operator must confirm that the coating and substrate are compatible with the instrument's measurement principle.

4. Common Powder-Coated Aluminium Products in Malaysia

The Landtek CM-8826FN is relevant to various aluminium manufacturing and finishing applications.

Architectural Aluminium

Examples include:

Aluminium window frames

Aluminium door frames

Aluminium curtain wall components

Architectural aluminium panels

Aluminium decorative profiles

Electrical Enclosures

Powder-coated aluminium is used for certain electrical cabinets, control housings and equipment enclosures.

Industrial Machinery Components

Manufacturers may apply powder coating to aluminium machinery covers, panels and brackets.

Metal Furniture

Powder coating is used for aluminium furniture frames and decorative components.

Automotive and Transportation Components

Suitable aluminium components may require coating thickness inspection during manufacturing or finishing.

For all applications, measurement suitability depends on the actual component geometry and coating system.

5. Equipment Required for Aluminium Powder Coating Inspection

Before measuring powder coating thickness, prepare the following equipment.

1. Landtek CM-8826FN Coating Thickness Meter

The main measurement instrument.

2. Appropriate NFe Probe

Use the correct probe for aluminium substrate measurement.

3. Reference Foils or Thickness Standards

Used for verification or adjustment according to the manufacturer's instructions.

4. Suitable Uncoated Aluminium Reference Surface

Where required, use a representative uncoated aluminium reference sample.

5. Cleaning Materials

Use a clean, suitable cloth to remove loose surface contamination.

6. Inspection Record

Prepare a measurement sheet or digital inspection record.

For formal inspection, additional documentation may be required by the customer's quality management system.

6. Step-by-Step Guide - How to Measure Powder Coating Thickness on Aluminium

Step 1 - Identify the Aluminium Substrate

Confirm that the component is made from a suitable aluminium substrate.

Examples include:

Aluminium sheet

Aluminium plate

Aluminium extrusion

Aluminium fabricated panel

Aluminium enclosure

The substrate thickness, electrical conductivity and geometry may influence measurement performance.

Step 2 - Select the NFe Probe

For powder-coated aluminium, use the NFe eddy current probe.

The CM-8826FN supports both Fe and NFe measurement functions, but the correct function must match the substrate.

Do not use the Fe function for ordinary aluminium coating measurement.

Step 3 - Inspect the Coated Surface

Before measurement, check the coating surface.

Look for:

Loose dust

Oil contamination

Surface debris

Visible coating defects

Irregular deposits

Damaged coating areas

Remove loose contamination where appropriate without damaging the coating.

The coating should be sufficiently cured and stable for the intended dry film thickness measurement.

Step 4 - Verify the Instrument

Before taking measurements, verify the instrument according to the manufacturer's operating instructions.

Use suitable reference foils or standards.

Where necessary, perform adjustment using an uncoated aluminium sample representative of the actual component.

This is especially important for:

Thin aluminium sheets

Curved aluminium profiles

Small components

Unusual substrate geometries

Different aluminium alloys

Important: A routine instrument adjustment is not equivalent to formal traceable calibration.

Step 5 - Position the Probe Correctly

Place the NFe probe against the coated aluminium surface.

For reliable measurement:

Position the probe correctly against the surface.

Avoid excessive tilting.

Maintain stable probe contact.

Avoid dragging the probe across the coating.

Keep the probe away from edges unless permitted by the instrument specifications.

Poor probe positioning may affect measurement consistency.

Step 6 - Take the First Measurement

Allow the instrument to obtain a stable reading according to its operating instructions.

For example:

Reading 1: 72 µm

This represents an illustrative measured coating thickness of approximately 72 micrometres at that location.

The reading must be evaluated against the applicable coating specification.

Step 7 - Measure Multiple Locations

Take measurements at locations defined by the inspection procedure.

For example:

Measurement PointCoating ThicknessPoint 172 µmPoint 275 µmPoint 378 µmPoint 474 µmPoint 576 µmArithmetic Average75 µm

These values are illustrative and do not represent actual product testing.

The average is calculated as:

Average Thickness = Total Thickness Readings / Number of Readings

For this example:

375 µm / 5 = 75 µm

However, the average alone does not establish compliance.

Acceptance depends on the applicable specification, sampling procedure and permitted thickness variation.

Step 8 - Compare the Results with the Specification

After measurement, compare the recorded readings with the coating manufacturer's requirements or project specification.

For example, a hypothetical powder coating specification may state a nominal dry film thickness of 70–90 µm.

In this case, the inspector must determine whether the measurement results satisfy the specified acceptance rules.

Important: The 70–90 µm range is only an example. It is not a universal powder coating thickness requirement.

Different powder coating systems may require different thickness ranges.

Step 9 - Record the Inspection Results

A useful powder coating inspection record may include:

Component identification

Aluminium substrate description

Coating product or system

Instrument model

Probe identification

Calibration or verification status

Measurement locations

Individual thickness readings

Applicable acceptance criteria

Inspection date

Inspector identification

Proper documentation helps manufacturers maintain consistent quality control records.

7. How to Measure Powder Coating on Aluminium Window Frames

Aluminium window frames are widely used in residential, commercial and industrial buildings throughout Malaysia.

Powder coating provides decorative finishing and surface protection.

However, aluminium window profiles may have narrow sections, corners and curved geometries.

Recommended Inspection Approach

Identify Suitable Measurement Areas

Choose locations where the probe can make proper contact.

Verify Probe Compatibility

Check the manufacturer's requirements for minimum measurement area and curvature.

Perform Instrument Adjustment

Use appropriate reference materials where required.

Take Representative Measurements

Follow the inspection plan and avoid relying on one reading.

Evaluate the Results

Compare the results with the relevant coating specification.

For narrow aluminium profiles, a specialised probe or alternative measurement method may be necessary.

The CM-8826FN should not be assumed suitable for every profile geometry.

8. Powder Coating Inspection on Aluminium Electrical Enclosures

Aluminium electrical enclosures are used in various industrial applications.

Coating thickness inspection can form part of the manufacturing quality control process.

Typical inspection areas include:

Flat enclosure panels

External covers

Accessible side panels

Suitable mounting surfaces

Finished aluminium components

The Landtek CM-8826FN can help measure compatible coating thickness at accessible locations.

However, the instrument does not directly evaluate:

Coating adhesion

Electrical insulation performance

Corrosion resistance

Surface preparation quality

Coating cure quality

These properties may require separate inspection methods.

9. Common Powder Coating Thickness Measurement Errors

Error 1 - Using the Wrong Probe

Using an inappropriate measurement function can produce invalid readings.

Solution: Use the correct NFe probe for compatible aluminium substrates.

Error 2 - Measuring Too Close to an Edge

Edge geometry may influence the probe response.

Solution: Follow the manufacturer's minimum edge-distance requirements.

Error 3 - Ignoring Aluminium Thickness

Thin aluminium substrates may influence measurement performance.

Solution: Verify the minimum substrate thickness requirements and perform appropriate adjustment.

Error 4 - Measuring Curved Profiles Without Verification

Curvature may affect the measurement result.

Solution: Check the probe's curvature limitations and use suitable reference samples.

Error 5 - Poor Probe Contact

Tilting or unstable positioning can reduce repeatability.

Solution: Position the probe correctly and repeat measurements where necessary.

Error 6 - Measuring Before the Coating Is Ready

A coating that has not completed the required curing process may not be suitable for final dry film thickness acceptance testing.

Solution: Follow the coating manufacturer's curing and inspection instructions.

Error 7 - Using Only One Measurement

A single reading may not represent the entire coated component.

Solution: Follow a defined measurement sampling procedure.

10. Understanding Powder Coating Thickness Units

Powder coating thickness is commonly expressed in micrometres (µm).

Some specifications use mils.

1 mil = 25.4 µm

Examples:

ThicknessApproximate Mils50 µm1.97 mils60 µm2.36 mils75 µm2.95 mils100 µm3.94 mils125 µm4.92 mils

These conversions are useful when comparing international coating specifications.

Always confirm the measurement unit before recording or evaluating results.

11. Powder Coating Thickness Measurement Standards

Industrial coating inspection may involve recognised standards and project-specific requirements.

ISO 2808

Paints and varnishes - Determination of film thickness.

This standard covers methods for determining coating film thickness.

ASTM D7091

Standard Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals.

This practice is relevant to compatible magnetic induction and eddy current coating thickness measurement methods.

ISO 2360

Non-conductive coatings on non-magnetic electrically conductive basis materials - Measurement of coating thickness - Amplitude-sensitive eddy-current method.

This standard is particularly relevant to suitable non-conductive coatings on aluminium and other compatible non-magnetic conductive substrates.

Project-Specific Requirements

Architectural and industrial powder coating projects may specify additional coating performance and inspection requirements.

Important: Using the CM-8826FN does not automatically establish compliance with any particular standard.

Instrument suitability, verification, calibration and measurement procedures must be evaluated against the applicable requirements.

12. Landtek CM-8826FN vs CM-8826N for Aluminium Inspection

Both the CM-8826N and CM-8826FN provide NFe measurement capability.

The main difference is substrate flexibility.

FeatureCM-8826NCM-8826FNNFe MeasurementYesYesFe MeasurementNoYesAluminium Powder CoatingYesYesSteel Paint MeasurementNoYesExternal ProbeYesYesMixed-Metal InspectionLimitedYes

For companies working exclusively with compatible coated aluminium, the CM-8826N may be sufficient.

For manufacturers handling both aluminium and steel components, the CM-8826FN offers greater flexibility.

13. Benefits for Malaysian Powder Coating Companies

The Landtek CM-8826FN can support powder coating quality control in several ways.

Non-Destructive Inspection

Compatible coatings can be measured without removing the finish.

Production Quality Monitoring

Manufacturers can check coating thickness at selected production stages.

Inspection Documentation

Measurement results can support quality assurance records.

Mixed-Metal Capability

The dual Fe/NFe configuration is useful for factories handling both steel and aluminium.

Portable Measurement

The instrument can be used at different inspection locations where environmental and application conditions are suitable.

For industrial users, reliable coating thickness measurement can help reduce avoidable rework and support consistent manufacturing quality.

14. Frequently Asked Questions

Q1. Can the Landtek CM-8826FN measure powder coating thickness on aluminium?

Yes. The NFe eddy current measurement function is intended for suitable non-conductive coatings on compatible aluminium substrates.

Q2. Which probe should I use for aluminium?

Use the appropriate NFe probe.

Q3. Can the CM-8826FN measure powder coating on steel?

Yes. Use the appropriate Fe magnetic induction probe for compatible powder coatings on ferromagnetic steel.

Q4. What is the normal powder coating thickness on aluminium?

The required thickness depends on the powder coating system, manufacturer recommendations and project specification.

There is no single thickness range suitable for every application.

Q5. Can the instrument measure narrow aluminium window profiles?

It may be possible where the probe can make proper contact and the geometry meets the manufacturer's requirements.

Very narrow or curved profiles may require a different probe or measurement method.

Q6. Can the CM-8826FN measure coating adhesion?

No. Coating adhesion requires a separate testing method.

Q7. Can the CM-8826FN measure anodising thickness on aluminium?

Certain anodic oxide coatings can be measured using appropriate eddy current methods, but compatibility and accuracy depend on the coating, substrate and instrument specifications.

Confirm the intended anodising application before selecting the instrument.

Q8. Where can I enquire about Landtek CM-8826FN in Malaysia?

Contact MTM Precision Sdn. Bhd. for product selection, quotation and availability enquiries.

15. Conclusion

Accurate powder coating thickness measurement on aluminium is an important part of industrial finishing quality control.

The Landtek CM-8826FN Coating Thickness Meter supports suitable aluminium coating inspection through its NFe eddy current measurement function.

Its external probe design and dual Fe/NFe configuration make it relevant to Malaysian manufacturers working with both aluminium and steel components.

For reliable measurement, users should focus on:

Correct NFe probe selection

Substrate and coating compatibility

Instrument verification

Proper probe positioning

Representative measurement sampling

Compliance with coating specifications

By following a consistent inspection procedure, powder coating companies can improve measurement reliability and maintain better quality assurance records.

Contact MTM Precision Malaysia

Looking for a Landtek CM-8826FN Powder Coating Thickness Meter in Malaysia?

MTM Precision supplies industrial measuring and testing instruments for aluminium fabrication, powder coating inspection, manufacturing and quality control applications.

For technical enquiries, quotation, product selection and availability, contact:

MTM Precision Sdn. Bhd. (744811-A)

Telephone: +603-8080 7172

WhatsApp: +6016-660 7346

Email: mtmpre@yahoo.com / enquiry@mtmpre.com.my

Website: www.mtmpre.com.my

Showroom & Service Centre:

No. 29-1 & 29-2, Jalan Bandar 18,

Pusat Bandar Puchong,

47160 Puchong, Selangor, Malaysia.

Business Hours: Monday to Friday, 9:00 AM - 6:00 PM.

We welcome enquiries from Selangor, Kuala Lumpur, Johor, Penang, Melaka, Negeri Sembilan, Perak, Pahang, Kedah, Kelantan, Terengganu, Perlis, Sabah and Sarawak.

Send us a photo of your aluminium component, coating type or inspection requirements through WhatsApp for assistance.

MTM Precision - Your Industrial Measuring and Testing Instrument Supplier in Malaysia.